I'm from Lanzhou, and I've been to other provinces and cities to eat the so-called "authentic Lanzhou Lamian Noodles". I want to say that beef noodles are authentic only in Lanzhou. Outside Lanzhou, other provinces and cities are opened by Qinghai people. Those so-called "authentic Lanzhou Lamian Noodles" and "Muslim Lanzhou Lamian Noodles" have nothing to do with the real Lanzhou beef noodles, and the taste and method are even different.